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Fuel-pumping system, method for operating a fuel-pumping system and fuel-injection system comprising a fuel-pumping system

A technology of fuel injection system and fuel pump, which is applied in the direction of fuel injection pump, low-pressure fuel injection, fuel injection device, etc. It can solve the problems of low viscosity, high internal leakage, difficult pumping, etc., and achieve the effect of avoiding pressure drop

Inactive Publication Date: 2010-12-01
VOLVO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pumping of DME is difficult because DME has a very low viscosity, resulting in high internal leakage, and the lubricating properties of liquid DME are very poor

Method used

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  • Fuel-pumping system, method for operating a fuel-pumping system and fuel-injection system comprising a fuel-pumping system
  • Fuel-pumping system, method for operating a fuel-pumping system and fuel-injection system comprising a fuel-pumping system
  • Fuel-pumping system, method for operating a fuel-pumping system and fuel-injection system comprising a fuel-pumping system

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Embodiment Construction

[0036] In the figures, identical or similar elements are preferably identified by the same reference numerals. The drawings are merely schematic representations, not intended to reveal specific parameters of the invention. Moreover, the drawings are intended to depict only typical embodiments of the invention and therefore should not be considered as limiting the scope of the invention.

[0037] figure 1 and figure 2 A preferred embodiment of the invention is illustrated and a fuel injection system 110 is schematically depicted, including a preferred fuel pumping system 100 for a fuel, in particular DME. Fuel injection system 110 may be coupled to an internal combustion engine (not shown). figure 1 A first mode of operation is shown in which the fuel is compressed to a high pressure in the first accumulator 10, and figure 2 A second mode of operation is shown in which fuel is compressed to high pressure within the second accumulator 20 .

[0038] For example, the two ho...

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Abstract

The invention relates to a fuel-pumping system for a fuel, comprising at least one reservoir (10; 20) providing a first volume (12; 22) for the fuel and a second volume (14; 24) for a compression fluid, a separator membrane (16, 26) between the first volume (12; 22) and the second volume (14; 24); - an inlet port (18, 28) of the at least one reservoir (10; 20) for feeding the fuel to the first volume (12; 22); an outlet port (38, 48) of the at least one reservoir (10; 20) for discharging the fuel at a high pressure from the first volume (12; 22); a fluid port (30a; 40a) of the at least one reservoir (10; 20) for supplying or removing the compression fluid to or from the second volume (14; 24). The invention also relates to an operating method and a fuel-injection system for such a fuel.

Description

technical field [0001] The invention relates to a fuel pumping system, a method of operating a fuel pumping system and a fuel injection system comprising a fuel pumping system according to the preambles of the independent claims. Background technique [0002] Dimethyl ether, also known as DME, is a clean fuel alternative to diesel fuel. DME can be produced from natural gas, coal or biomass. In modern vehicles, common rail systems are used for better performance of internal combustion engines. In this common rail system, fuel is compressed to high pressure by a common rail pump and supplied to the engine. However, pumping of DME is difficult because DME has a very low viscosity, resulting in high internal leakage, and the lubricating properties of liquid DME are very poor. Therefore, pump failure is one of the major obstacles for commercial engine applications. [0003] There is also a need to increase injection pressure to around 1000 bar to improve cycle efficiency, for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M37/18F02M63/02
CPCF04B43/06F02M37/0052F02M59/14F02D19/0605F02D19/0684Y02T10/36F02D19/0681F02M37/0088F02M69/50F02M63/0225F02D19/0665F02M37/0064F02D19/0647Y02T10/30Y10T137/0379Y10T137/86043
Inventor 斯塔凡·隆格伦
Owner VOLVO TECH